Eric Lee / smarc-uboot

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cmd/cpu.c 2.45 KB
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d41ce506b   Eric Lee   Initial Release, ... 
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  /*
   * Copyright (c) 2015 Google, Inc
   * Written by Simon Glass <sjg@chromium.org>
   * Copyright (c) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  #include <common.h>
  #include <command.h>
  #include <cpu.h>
  #include <dm.h>
  #include <errno.h>
  
  static const char *cpu_feature_name[CPU_FEAT_COUNT] = {
  	"L1 cache",
  	"MMU",
  	"Microcode",
  	"Device ID",
  };
  
  static int print_cpu_list(bool detail)
  {
  	struct udevice *dev;
  	char buf[100];
  
  	for (uclass_first_device(UCLASS_CPU, &dev);
  		     dev;
  		     uclass_next_device(&dev)) {
  		struct cpu_platdata *plat = dev_get_parent_platdata(dev);
  		struct cpu_info info;
  		bool first = true;
  		int ret, i;
  
  		ret = cpu_get_desc(dev, buf, sizeof(buf));
  		printf("%3d: %-10s %s
  ", dev->seq, dev->name,
  		       ret ? "<no description>" : buf);
  		if (!detail)
  			continue;
  		ret = cpu_get_info(dev, &info);
  		if (ret) {
  			printf("\t(no detail available");
  			if (ret != -ENOSYS)
  				printf(": err=%d", ret);
  			printf(")
  ");
  			continue;
  		}
  		printf("\tID = %d, freq = ", plat->cpu_id);
  		print_freq(info.cpu_freq, "");
  		for (i = 0; i < CPU_FEAT_COUNT; i++) {
  			if (info.features & (1 << i)) {
  				printf("%s%s", first ? ": " : ", ",
  				       cpu_feature_name[i]);
  				first = false;
  			}
  		}
  		printf("
  ");
  		if (info.features & (1 << CPU_FEAT_UCODE))
  			printf("\tMicrocode version %#x
  ",
  			       plat->ucode_version);
  		if (info.features & (1 << CPU_FEAT_DEVICE_ID))
  			printf("\tDevice ID %#lx
  ", plat->device_id);
  	}
  
  	return 0;
  }
  
  static int do_cpu_list(cmd_tbl_t *cmdtp, int flag, int argc,
  		       char *const argv[])
  {
  	if (print_cpu_list(false))
  		return CMD_RET_FAILURE;
  
  	return 0;
  }
  
  static int do_cpu_detail(cmd_tbl_t *cmdtp, int flag, int argc,
  			 char *const argv[])
  {
  	if (print_cpu_list(true))
  		return CMD_RET_FAILURE;
  
  	return 0;
  }
  
  static cmd_tbl_t cmd_cpu_sub[] = {
  	U_BOOT_CMD_MKENT(list, 2, 1, do_cpu_list, "", ""),
  	U_BOOT_CMD_MKENT(detail, 4, 0, do_cpu_detail, "", ""),
  };
  
  /*
   * Process a cpu sub-command
   */
  static int do_cpu(cmd_tbl_t *cmdtp, int flag, int argc,
  		  char * const argv[])
  {
  	cmd_tbl_t *c = NULL;
  
  	/* Strip off leading 'cpu' command argument */
  	argc--;
  	argv++;
  
  	if (argc)
  		c = find_cmd_tbl(argv[0], cmd_cpu_sub,
  				 ARRAY_SIZE(cmd_cpu_sub));
  
  	if (c)
  		return c->cmd(cmdtp, flag, argc, argv);
  	else
  		return CMD_RET_USAGE;
  }
  
  U_BOOT_CMD(
  	cpu, 2, 1, do_cpu,
  	"display information about CPUs",
  	"list	- list available CPUs
  "
  	"cpu detail	- show CPU detail"
  );